Acetylene gas generator



Sept. 4, 1934. c. DE LA ROCHETTE ACETYLENE GAS GENERATOR Filed March 2,1929 3 Sheets-Sheet l 3 Sheets-Sheet 4 2 c. DE LA ROCHETTE ACETYLENE.GAS GENERATOfi Filed March 2. 1929 Sept. 4, 1934.

Sept- 4, 1934. c. DE LA ROCHETTE 1,972,646

ACETYLENE GAS GENERATOR Filed March 2. 1929 3 Sheets-Sheet 3 amplevarious modes of execution of my inven- 40 hydraulic valve.

Patented Sept. 4, 1934 UNITEDQSTAT ES a Y 1,972,646. p AOETYLENE GAS"GENERATOR Charles de La Rochette, Neuilly-sur-Seine,

. France Application March 2, 1929, Serial No. 343,864-

In France March 6, 1928 1 Claim. (01. 48-17) My invention relates to anacetylene gas gen erator of simple construction and complete safetywhichmay advantageously feed a motor or a blow torch operating bysuction. I

The principle upon which the present gas gen erator is based consists inthe passage of atomized water or of water saturated air which is'brought in contact with the calcium carbide through the underpressurecreated by the suction of the motor orof, the blow torch.

The water may be atomized either by means of a small injector drawing inwater and air by suction or simply by means of a tube immersed in thewater contained in a receiver, the ad-' mission being preferablycontrolled by means of a needle valve. Alternately; air saturated withwater may be caused to pass by'suction also through a porous materialimmersed in said water or simply upon said porous material such ascotton fabric for example arranged in the shape of a coil or the fabricstaggeredly arranged. Y

When the apparatus is used in combination with a motor, the waterfromthe combustion gases maybe condensed and air saturated with withsaid steam may be caused to pass by suction in contact with the calciumcarbide; steam only or condensed water may also be used in the samemanner.

The appended drawings show by way of extion.

Fig. 1 is a part longitudinal sectional view or a first type ofapparatus.

Fig. 2 is a side elevation of same.

Figs. 3 and 4 are respectively a 'partlongitudinal sectional View and aside elevation of a modified form of apparatus.

Fig. 5 is a side sectional view of part of a further modificationshowing particularly a Fig. 6 is a transverse sectional view of anothermodified form.

Fig. 7 is a longitudinal sectional, view of a third mode of execution.

Fig. 8 is a transverse sectional view of a fourth mode of executiondesigned more particularly for use with an aircraft motor.

Fig. 9 shows an engine with the carburetter, Fig. 7, applied thereto. 7

Fig. 10 is a cross section of Fig. 7.

The apparatus shown in Fig. 1 which has been designed for working withatomized water comprises a container at one end of which is providedwith an inlet tube b in which the suction tube 0 for the water leadingto the injector d is immersed. The apparatus is provided at its otherend in the water compartment c with an hydr'aulic' valve of any suitablekind, which causes the gas to pass through an orifice a" near the top ofcompartment e and through the Water before it escapes at f. Said valveensures the absolute safety of the apparatus in case or" back firing;and serves at the same time as gas purifier.

" j As will be seen in Figs. '1 and 3, the valve e is constituted merelyby a float g perforated at 9 h is a flexible tube which allows themovements of the float and connects the float to a stationary tube hthat passes out of compartment 6 at h? and connects outside the watercompartment with discharge A water-tight door 0 closes the container a.

In the modification shown in Fig. 5, the tube It is replaced by a smallrubber cover 71. of great flexibility which follows every movement ofthe float. In both the above described; valves. the float is designed toallow of using the same water as that of V the container; the pressureof which water acting against the suction is continuous.

A small receptacle filled with a purifying mixture of any appropriatekind may be combined with said valve for eliminating the hydrogensulphide gas; the same result may be obtained by adding to the calciumcarbide of iron oxide. A blow-off cock may be provided at the lower endof the valve.

When the motor or the injector of the blow pipe are started the partialvacuum thus produced causes theinstantaneous atomizing of the water bythe injector and the production of gas in the carbide container 2' isall the more abundant as the suction is stronger; when the motor or theblow pipe are not in operation the production of gas is interrupted.

Fig. 3 shows an apparatus in which the gas is produced by the moist airpassing through the cloths 7' before it reaches the carbide contained inthe box i. Water tight door 0 allows the loading and unloading of thecarbide box.

Fig. 6 shows an apparatus of a more simple In that case the water isproduced by means of C the condensation of the steam when the combustiongases escape.

The apparatus shown in Fig. 6 is mounted with a Cardan joint at n and isdesigned more especially for aerial navigation.

In the mode of executionshown in Fig. 7 the apparatus comprises areceiver a. filledjwith water in which blocks of porous material p areimmersed, the level of the water being indicated by a tube N placed onthe outside. A carbide box 2' is engaged in said receiver which isclosed in front by a gate 0 which is provided with a water-tight packingo and is. strongly pressed in position by means of an eccentric lever q.

The receiver is provided with an extension 0,

in which is arranged a tube -r in communication on the one part withthecylinder z and opening t2. upon the third extension a 'I 'he airflowing in at k is moistened as it comes in contact with the porousmaterial, it then passes, through the strainer t, the tube. 1' and thebox 2' from where it passes on the car-I bide. The acetylene gasproduced is drawn out at f. I

In the modified form shown in Fig. 8 which is more especially designedfor aircraft motors, the

receiver a is providedwith two pipe systems 11.

for the combustion gases which enter in the midst of the porousmaterial. The condensation of the water steam contained in said gases isensured by a set of tubes 1: through which flows an air stream. Air isadmitted at. k. The receiver ais connected with thecarbide box 13 insuch a manner that the moistened air passes through the carbide layer.The acetylene gas is discharged at the top through I. The carbide beingsupported on the strainer 10 the lime dust which is produced falls tothe bottom of the apparatus and is discharged by means oi a suitableplug, not shown. I

Itis aknown fact that acetylenegas is most "advantageous for use inaircraft motors for the following reasons: 1'. The possibility ofutilizing heavy and cheap carburettingmaterials. 2. Theggreat economy incalories which is recylinder of the heavy carburization material due tothe heat of its flame.

, 3.-The ignition takes place very easily.

The apparatus according to the present invention may therefore beadvantageously used in connection with motors and blow pipes, -it being,thoroughly safe in operation and completely self operating. Owing to.thefact that it does not give any excess of, production, theconsumption of acetylene gas is consequently smaller than.in'existing'apparatus, it" does not require any pressure, moreover asthere are neither valves nor reducing valves there is con: sequently noadjustmentjrequired.

What I claim and desire to secure Patent of the United S tai', es iInaan acetylene gas generatorfa" water reservoirQa, chamber for calciumcarbide, a tube extending downwardly into the water of the reservoir,an'injectorconnected to the atmosphere and opening into the calciumcarbide chamber, the tube being connected with the injector, adirect'connectionbetween the carbide chamber and the'water' chamber, agas' outlet by Letters alized owing'to'the complete vaporization in theconduit extending below the water or the water reservoir, a float inthewater reservoir having a gas outlet opening above and closely adjacentthe water level, and a flexible conduit between said fioatandoutletconduit. i

' CHARLES DE LA ROCHE'I'I'E.

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